tender for procurement, installation and commissioning of piezometers to monitor pore water pressure at ash dyke, sgtpp , procurement, installation and commissioning of piezometers to monitor pore water pressure at ash dyke, sgtpp , piezometer, pore water meter for ash dyke system, sgtpp ,sensor to measure pore water pressure in soil, max. depth: 20 meters, with corrosion resistant durable body, with heavy duty standby-pipe with lockable top cap/cover for piezometer protection. ( with attached cable(25mtrs length) ) , portable display/ readout unit for piezometers, ash dyke at sgtpp ,display pore water pressure, for piezometer with range of 20mtr depth , battery powered operation, with led/lcd back-light. ( display range:0 to 500kpa, with waterproof enclosure case ) , installation & commissioning